Functional Dyspepsia – Causes, Symptoms and Treatment
Functional dyspepsia is a chronic condition causing persistent upper abdominal discomfort without any identifiable organic cause. It is one of the most common gastrointestinal disorders worldwide.
Wissenswertes über "Functional Dyspepsia"
Functional dyspepsia is a chronic condition causing persistent upper abdominal discomfort without any identifiable organic cause. It is one of the most common gastrointestinal disorders worldwide.
What is Functional Dyspepsia?
Functional dyspepsia is a chronic disorder of the upper digestive tract characterised by recurring discomfort or pain in the upper abdomen (epigastric region) for which no structural, biochemical, or organic cause can be identified. The term derives from the Greek words dys (bad) and pepsis (digestion). It is estimated to affect between 10 and 30 percent of the global population, making it one of the most prevalent gastrointestinal conditions.
According to the international Rome IV criteria, functional dyspepsia is divided into two subtypes: postprandial distress syndrome (PDS), characterised by bothersome postprandial fullness and early satiation, and epigastric pain syndrome (EPS), defined by pain or burning in the epigastric region.
Causes
The exact causes of functional dyspepsia are not yet fully understood. It is considered a multifactorial condition involving several contributing mechanisms:
- Impaired gastric motility: Delayed gastric emptying or reduced gastric accommodation (the ability of the stomach to relax and expand after eating) can trigger symptoms.
- Visceral hypersensitivity: Affected individuals are more sensitive to normal distension stimuli in the gastrointestinal tract.
- Helicobacter pylori infection: This bacterial infection of the stomach lining is present in a subset of patients and may contribute to symptom development.
- Psychosocial factors: Stress, anxiety, and depression are closely linked to the onset and worsening of symptoms.
- Low-grade mucosal inflammation: Subtle inflammatory changes and alterations in the gut-brain axis are also considered potential contributors.
- Genetic predisposition: Family clustering suggests a hereditary component in some cases.
Symptoms
Symptoms of functional dyspepsia vary in type and intensity and may fluctuate over time. Common symptoms include:
- Persistent postprandial fullness after meals
- Early satiation when eating only small amounts of food
- Pain or burning sensation in the upper abdomen
- Nausea, occasionally vomiting
- Belching and bloating
- Loss of appetite
By definition, these symptoms must have been present for at least three months, with onset at least six months prior to diagnosis.
Diagnosis
Functional dyspepsia is a diagnosis of exclusion, meaning that organic causes such as peptic ulcer disease, gastric cancer, gallbladder disease, or gastroesophageal reflux disease must first be ruled out. Typical investigations include:
- Medical history and physical examination: Assessment of symptoms, dietary habits, and medication use.
- Upper endoscopy (esophagogastroduodenoscopy): Direct visualisation of the mucosa of the esophagus, stomach, and duodenum.
- Helicobacter pylori testing: Via urea breath test, stool antigen test, or biopsy during endoscopy.
- Blood tests: To rule out systemic conditions such as coeliac disease or thyroid disorders.
- Abdominal ultrasound: Evaluation of the liver, gallbladder, and pancreas.
Treatment
There is no single universal treatment for functional dyspepsia. Management is tailored to the individual based on symptom patterns and potential triggers.
General Measures
- Dietary adjustments: small, frequent meals; avoidance of fatty, spicy, or acidic foods
- Stress reduction and relaxation techniques
- Avoidance of alcohol, smoking, and NSAIDs (non-steroidal anti-inflammatory drugs)
Pharmacological Treatment
- Proton pump inhibitors (PPIs): Often effective in patients with epigastric pain syndrome (e.g., omeprazole).
- Prokinetic agents: Promote gastric emptying (e.g., metoclopramide, domperidone) and may benefit patients with postprandial distress syndrome.
- Helicobacter pylori eradication: Antibiotic-based treatment is recommended when infection is confirmed.
- Low-dose antidepressants: Tricyclic antidepressants or SSRIs may be considered when psychosocial factors are prominent.
- Herbal preparations: Combination products such as STW 5 (Iberogast) have shown positive effects in clinical studies.
Psychological Approaches
Cognitive behavioural therapy and gut-directed hypnotherapy can be effective complementary approaches, particularly for patients with significant psychosocial stress or anxiety.
Prognosis and Course
Functional dyspepsia is generally not life-threatening but can significantly impair quality of life. The condition often follows a chronic, relapsing-remitting course. In some patients, symptoms improve spontaneously over time. Regular medical follow-up is recommended to monitor symptoms and exclude the emergence of organic disease.
References
- Stanghellini V et al. - Gastroduodenal Disorders. Gastroenterology, 2016; 150(6):1380-1392. (Rome IV Criteria)
- Moayyedi PM et al. - ACG and CAG Clinical Guideline: Management of Dyspepsia. American Journal of Gastroenterology, 2017; 112(7):988-1013.
- Ford AC et al. - Functional dyspepsia. The Lancet, 2020; 396(10263):1689-1702.
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Related search terms: Functional Dyspepsia + Functional Indigestion + Dyspepsia